General Information

Event name: US-98-024
Nature of the harmful event:
Seafood toxins
Event directly affected:
Shellfish , Humans
Toxicity detected: Yes
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes
Individuals to contact: OSTASZ, Michael J.

Location & Date

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Location: Latitude: 58.545833, Longitude: -134.920833
General location information: Sentinel Island., Alaska.
HAB Area code(s): US-25
Additional location information: 0.2 mile long in center of Favorite Channel, 0.6 mile SW of Benjamin Island and 25 miles NW of Juneau.
Bloom event dates (yyyy/mm/dd): Event Date:1998-04-30
Start: 1998-04-30,
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium sp. ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information: Area has had previous cases of PSP in the past with recreational/sports harvesters.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: N/A.
Additional harmful effect information: One person experienced tingling in his lips and fingertips after one hour of eating a meal of limpets. Limpets were boiled and siphons and viscera were not consumed.